namespace _espe.repository.name_index
{
	
	/**
	 */
	var _chest : (
		null
		|
		lib_plankton.storage.type_chest<
			Array<any>,
			Record<string, any>,
			lib_plankton.database.type_description_create_table,
			lib_plankton.storage.sql_table_common.type_sql_table_common_search_term,
			Record<string, any>
		>
	) = null;
	
	
	/**
	 */
	function get_chest(
	) : lib_plankton.storage.type_chest<
		Array<any>,
		Record<string, any>,
		lib_plankton.database.type_description_create_table,
		lib_plankton.storage.sql_table_common.type_sql_table_common_search_term,
		Record<string, any>
	>
	{
		if (_chest === null) {
			_chest = lib_plankton.storage.sql_table_common.chest(
				{
					"database_implementation": _espe.helpers.database_implementation(),
					"table_name": "name_indices",
					"key_names": ["name_image"],
				}
			);
		}
		else {
			// do nothing
		}	
		return _chest;
	}
	
	
	/**
	 */
	async function get_name_image(
		name : string
	) : Promise<string>
	{
		return (
			(! _espe.conf.get().settings.name_index.veil)
			? name
			: await lib_plankton.sha256.get(
				lib_plankton.json.encode(name),
				_espe.conf.get().settings.name_index.salt
			)
		);
	}
	
	
	/**
	 */
	export async function read(
		name : string
	) : Promise<int>
	{
		const name_image : string = await get_name_image(name);
		let row : Record<string, any>;
		try {
			row = await get_chest().read([name_image]);
			return row["index"];
		}
		catch (error) {
			return 0;
		}
	}
	
	
	/**
	 */
	export async function write(
		name : string,
		index : int
	) : Promise<void>
	{
		const name_image : string = await get_name_image(name);
		await get_chest().write([name_image], {"index": index});
	}
	
}